Questions tagged [inductive]

In the context of electronics, inductive refers to circuits that use magnetic fields, for things such as power or data transfer or sensing metal objects

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My all Inductive sensors are not working with my board

I am working on a board which has six inductive sensors. I am using optocouplers for isolation between sensor output and MCU, but four of them work fine and two show very unreliable behaviour. When I ...
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29 views

Grounding Ignition Coil Using IGBT ckt…Not Working + Can't Understand?

I am a hobbyst, and recently been working on a small project of my own, Creating a rev limiter of my own. Following is my circuit which will explain a lot about what I am trying to do. First of all ...
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155 views

Intuitive way of “visualizing” how the energy is stored in an inductor?

I've been trying to more or less understand intuitively how energy is stored in an inductor, but I don't seem to get anywhere decent. In a capacitor I understand, I believe: an external battery pushes ...
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43 views

Does turning on inductive load (ex. AC motor) at peak input voltage reduce inrush current?

I was checking out the following project on hackster and at some point the author claims that When the load is predominantly of inductive type, the turn-on is performed at the peak of the input ...
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104 views

How can I increase inductive spike voltage?

I would like to know how I can increase the maximum voltage of inductive spikes. I’m investigating their use in electrolysis - the bigger the spike the better. To create the spikes, I’m using an ...
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48 views

Why is an inductive load not desirable for a GTO circuit?

I was wondering why is an inductive load not good for a GTO circuit from a power electronics perspective.
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37 views

36V inductive charging coil or multiple coils

I want to charge a 36V lithium battery using an inductive charging setup, input 36V and output 36V. Currently I am charging at 2 amps, so along those lines. I can only find coils online that work up ...
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45 views

Can you have “directional” wireless power transmission (to power an LED)

I've tried to research this, but the only circuit examples I can find use an "oscillating field". I have a project where I would like to put two differently colored LEDs in an object, and ...
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45 views

Low Power Toroidal Conductivity Sensor Inconsistent Values

I have been trying to build a low power toroidal liquid conductivity sensor using the principle given in this image. This link has more information about the principle behind the sensor. What I have ...
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42 views

Zero cross control for inductive loads

Is zero cross control acceptable for small motors? I know it is bad to have voltage and current out of phase for inductive loads but wanted to know if it would not be harmful to small motors (< 500 ...
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89 views

Using Arduino to control mosfet switches for an inductive load failure

I'm trying to control four maglocks with mosfets using an Arduino uno, but the results are a bit unpredictable. When only one maglock is connected, no matter which one, it works perfectly (I.e. ...
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34 views

Relays for switching circuilation pumps

I have a board populated with Omron relays (G5Q-1A4-EU DC5) and I want to use them to switch circulation pumps (https://imp-pumps.com/pumps/ghn/). Is the previous relay appropriate to be used with ...
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42 views

What can I use to switch a 500mA 12v inductive load from 3.3v Output

I have a ESP8266 that needs to switch a water valve that draws 500mA on 12V. What can I use to switch that load? Right now I think I will use a logic level Mosfet but I am a bit lost with choosing the ...
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61 views

Why are high frequency signals not disturbed by stray fields?

I am trying to design an inductive position sensor based on a high-frequency signal. It is mentioned that using high-frequency signals gives immunity towards stray magnetic fields. Could anyone ...
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22 views

In Inductive Position Sensor the air gap between the metal target and coil changes the position value?

I am trying to design the inductive position sensor with the inductive sensor IC ZMID5201. I am trying to optimize the air gap betweeen sensor coil and metal target. As per the datasheet its ...
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43 views

ISO 7637 Supply Transient pulses - Explanation

I am trying to design an input power supply filter circuit inorder to protect from ISO 7637 pulses. I am referring this Little fuse app note There seem to be different pulses. Pulse 1, 2a, 2b and so ...
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33 views

Protective measure against powering inductive loads

From various chip manufacturer articles and other post in this site, I still have doubts on my circuit for switching inductive loads. I have two setup here that both switches an inductive but using ...
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58 views

Determining direction from an inductive joystick

I'm trying to understand and (eventually) repurpose an old inductive joystick, but I'm not sure how the micro controller determines which direction the stick was pushed in? There are 4 coils on the ...
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81 views

Snubber circuit to protect SCR/Diode

In my circuit I need to discharge a capacitor into an inductive load using SCR. In order to make the circuit oscillate there'll be a diode antiparallel with the SCR, as you can see in the picture. My ...
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69 views

Switching Inductive load with SSR on 240AC

I am working on building a kiln (approx 7.5kW) and am using a PID to control an SSR that drives a heating element I made from Kanthal wire. The problem I am having is that the heating element is a ...
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224 views

Inductive and resistive load current draw - PSU

Below schematic is a simplified version of a power supply: simulate this circuit – Schematic created using CircuitLab When the voltage is set to 12V and current limit is set to 100 mA and ...
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1answer
318 views

How to prevent voltage spikes when motor is turned off

I have a schematics as shown below. The power source is a benchtop power supply which supplies a constant 24V power. Motor is controlled with ESC. When running the motor and then turning it off I ...
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149 views

Inductive toroidal conductivity sensor doesn’t work with enclosure on toroidal inductor

I’m building a inductive conductivity sensor using the principle shown in this image. I built a 4khz sine wave generator and connected it with the drive coil and look at the voltage across the pickup ...
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87 views

Need help identifying two and three terminal SMD components

There are two kinds of components which I need to know about:
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51 views

fan speed regulation causes other loads flickkering

I am using traic based dimmer circuit for regulating my ceiling fan. when the fan is regulated to low speed the other loads(incandescent,tube light,LED) in the room are flickering. when i increase the ...
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96 views

Why can't we operate at high frequencies (>0.5GHz) when having a resonant inductive coupling circuit?

I am currently trying to figure out if a high frequency (GHz) resonant inductive coupling circuit would be feasible and efficient when wirelessly transferring power. Through many research papers, ...
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270 views

Do Protected Power MOSFETs need a flyback diodes?

There are protected MOSFETs under various marketing names available (e.g. omnifet, hitfet, intellifet, etc). These devices include clamping diodes and overcurrent/temperature protection. They also ...
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87 views

Transistor Limit Current

I am using a LM395T transistor for an inductive load (a motor). The voltage limit is well within the 36V threshold. But current isn't limited. The specs of the transistor say that 1.5 A is maximum. ...
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265 views

What's the role of the capacitors in this AC circuit?

I've been around electronics for a lot of time but I really didn't understand how capacitors work in an AC or DC circuits. I know capacitor has a big role in smoothing the output of bridge rectifier. ...
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64 views

Snubber capacitor Voltage rating

I am designing a switching circuit for celing fan (max 80W/230VAC). This is basically relay based switching. I planned to add snubber circuit to reduce the back emf. I got a resistor value of 100&...
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58 views

Electro-mechanical relay durability curve

For general-purpose electro-mechanical relays, it is often mentioned in datasheets the number of cycles under various categories of load (AC1, AC15, DC1, DC13 etc.). For example, the following image: ...
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29 views

measuring wireless (inductive) power supplies

I bought an electric toothbrush with a lithium-ion battery and wireless (inductive) charger. It came with one of those air/water jet flossing accessories, which also has a lithium-ion battery and a ...
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278 views

AC motor control with triac or relay

I want to remote control (WiFi/Zigbee) a water pump AC motor, 1 phase or 3 phase depending on the case, with the smallest board size possible. I have used large motor AC contactor in past, it works ...
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501 views

Inductive Proximity Sensor Proteus Simulation

Do you know how can I simulate in Proteus a similar component to the Inductive Proximity Sensor? I don't find it on the default libraries Is it recommended to simulate every single component?
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639 views

P-MOSFET failing

I am using this solution to drive a large (huge) relay on a boat. The system works well for months on end, but eventually the MOSFET (T2) dies suddenly. I have modified the schematic to include the ...
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123 views

2n7000 used for inductively coupled load modulation apparently latched

So I've got a fairly basic circuit set up for load modulation of an inductively coupled circuit: A few notes on the above: LC's were designed for 1 MHz but work better at 950 kHz, thus the chosen ...
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97 views

Protecting an IO pin from a spike

I am building a circuit which communicates with an external Power Supply via UART. One of the IO pins from my MCU is connected to an optocoupler I have 4 relays on my PCB, they are separated ...
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77 views

Fake energy saver inductive loads

I watched this video on YouTube, it covered fake energy saving devices. I have seen many of these fake devices and they all seem to use a capacitor. My question is why would they bother? The person ...
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98 views

Conditioning input power supply on PCB

I have had issues in the past with using too close of an input power supply to the max rating of my main power regulator causing failures. For example, I used a 24VDC supply with a regulator with an ...
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852 views

P-Channel MOSFET reverse polarity protection on NMOS array chip

I'm trying to achieve reverse polarity protection for the TPL7404LADR chip which is basically an updated version of the ULN2003 darling transistor array. To do this I want to use a P Channel MOSFET ...
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65 views

Inducitve Proximity Sensor - Safety Gate Latch Codes?

If I am using an inductive proximity sensors as a safety gate latch, what codes and standards do I need to abide by? Some safety sensors I research have: - Category 3 (EN ISO 13849) - Safety ...
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228 views

Ideal LC circuit decays over time in LTspice

I was trying to simulate a transformer without a load, and setting an initial condition to observe how the energy will flow from the primary to the secondary circuit. I realized that the energy will ...
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147 views

ADC oscillation problem with inductive load

ADC in question is onboard ATMega168 micro controller. Relevant parts of the circuit look like this: simulate this circuit – Schematic created using CircuitLab Now I know AVCC is recommended ...
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324 views

PL-08N inductive sensor not turning off

I have one of these inductive sensors marked as PL-08N which should work within a 4-30VDC range and trigger at 8mm or less. I wired it as described below, with my ...
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152 views

Advice on choosing components for a flyback arrangement, for switching inductive loads fast

I have a bank of x6 MOSFETs (SUG90090E) connected in parallel, which I am using to switch a current of maximum 30A through a coil (resistance 1R and inductance 1mH), and am looking for some general ...
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What would happen if you accidentally casually put your apple watch on a wireless charger meant for phones or other higher power devices for hours? [closed]

What would happen if you accidentally, casually (because they're supposed to be so convenient!) put your apple watch on a wireless charger meant for phones or other higher power devices for hours? Or ...
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225 views

How to safely switch a big inductive load with a Triac using a capacitor snubber?

I am building a Spot Welder with a big powerful transformer. I have to switch a big inductive load of 70mH (input of a transformer) The switching will be done with an SSR (Opto Triac Zero crossing SSR-...
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123 views

WPT compensation topologies

I'm experimenting with compensation topologies for inductive WPT systems and have a small confusion. The general WPT industry uses compensation networks to cancel out reactive components in the ...
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228 views

Why does the voltage induced in the receiver coil of this WPT circuit decrease when a load is added (in parallel)?

The following is a circuit that wirelessly transfers power via inductive coupling. The circuit is supposed to power a 12 V 0.15 A DC fan and a typical smartphone, which requires 5 V DC across it. The ...
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101 views

What's causing the audible 7/8th rhythm in Qi chargers?

I have a wireless Qi charging system for my mobile phone. When I put the phone into the cradle it starts getting charged and I can hear a very quiet noise coming from the arrangement. Other ...

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